Fire-alarm



(No Model.)

A. V'. STRAIT.

` Fire Alarm. No. 243,!72. Patented June 21,1881.

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UNITED STATES PATENT OFFICE-o ANDREW V. STRAIT, OF SIDNEY PLAINS, NEW YORK.

FIRE-ALARM.

SPECIFICATION forming part of Letters Patenta No. 243,172, dated June 21, 1881.

Application filed May 5, 1881.

To all 'whom it may concew Be it known that I, ANDREW V. STRAIT, a citizen of the United States, residing at Sidney Plains, in the county of Delaware and State of New York, have invented certain new and useful Improvements in Fire-Al arms for Buildin gs; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a View showing the application 'of myinvention to the interior of a building. Fi g. 2 is adetail View on an enl'arged scale, showing the cords and weight and alarm mechanism.

The present invention has relation to certain new and useful improvements in that class of fire-alarms for the interior of buildings in which a cord having a weight connected to one end is so arranged that the fiame consuming the cord will cause the weight to drop, and in doing so sound an alarm upon a suitable alarm mechanism.

The invention consists in the pcculiar arrangement of the cords, whereby they will encircle the window -frames, tlues, and other places or objects in a room, so that when a fire breaks out at any of these places the alarm will be at once sounded by the flamesevering the cord, as hereinafter more fully described, and subsequently pointed out in the claim.

In the accompanyin g drawings, A represents the interior of a building, having the nsnal windows, a, and flue b. At the top of the room, or near the wall or ceiling, I arrange a series of wires, a, connected together to make a continuous line by short fibrous cords (l, and extending from these cords are similar cords, e. These last-mentioned cords are passed around the window-frames, flues, or other portions of the room or apartments of a building where a fire would be most likely to break ont. 'The (No model.)

along its line, has connected to it a weight, B, a section of cord passing around a pulley, f, with its ends connected to the ends of the wires. The wire may extend up to the next room or compartment, and be arranged in a similar manner, with the cords d e around the interior thereof. This system and arrangement of wires and cords may extend to every room or compartmcnt of the building, and one alarm nechanism may answer for the whole, orany number may be used, as found desirable. This alarm mechanism is incased in a suitable box, C, and consists, essentially, of the ordinary cog-wheels, coil-spring, and escapement used in an alarm-clock.

I have simply shown the two principal cogwheels g' h of the alarm mechanism, sufficient to illustrate the invention.

The escapement ihas connected to it the hammer k, which sounds the alarm on the bell l, and the arm m, the outer end of which rests on the end of a pivoted trip-lever, D, the upper or vertical portion of which passes up through an opening in the top of the box C; and has connected to it a platform, a.

When a fire breaks out and the flane extends to the cord c at any point, the flame will follow up the cord as fast as it is being consumed until the flane reaches the cord d, and when this is consumed the connection is severed between the two sections of wire, which allows the weight B to drop on the platform a. As the platform a is pressed down by the weight B the end of the trip-lever D upon which the end of the arm m rests is thrown up, disengaging the arm with the lever and setting ofi' the alarm.

The sections of wire o in connection with the cords is considered of great importance, as it insures a more perfect operation of the alarm at the moment a fire breaks out, the wires preventing the knotting or twisting of that portion of the line running along the top of the ceiling and down through the same. The wires prevent to a great extent the line of connection being entirely consumed, as the alarm is sounded the moment any of the cords d or eis destroyed.

Having now fully described my invention, what l claim as new, and desire to secure by Letters Patenta, is

The combination, with the sections of wire IOO c and cords d, having connected thereto a hereunto subscribed my name in the presence weight, and adapted to operate a suitable of two witnesses. alarm, of the cords e, arranged, as shown and described, to encircle the window-frames, flues, 5 and other objects within aroom, substantially witnesses:

as and for the purpose set forth. A. W. HILL,

In testimony that I claim the above I have HENRY STEVER.

ANDREW V. STRAIT. 

